JP2011205602A5 - - Google Patents

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JP2011205602A5
JP2011205602A5 JP2010086547A JP2010086547A JP2011205602A5 JP 2011205602 A5 JP2011205602 A5 JP 2011205602A5 JP 2010086547 A JP2010086547 A JP 2010086547A JP 2010086547 A JP2010086547 A JP 2010086547A JP 2011205602 A5 JP2011205602 A5 JP 2011205602A5
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difference signal
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integer
integer conversion
inverse
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フレーム画像を分割することによって得られる符号化対象ブロックと前記符号化対象ブロックに対して生成される予測画像とに基づいて、前記符号化対象ブロックと前記予測画像との間における輝度信号の差分信号及び色差信号の差分信号を生成するとともに、前記輝度信号の差分信号及び前記色差信号の差分信号の符号化を行う符号化装置であって、
前記輝度信号の差分信号の整数変換処理を行うとともに、前記色差信号の差分信号の整数変換処理を行う整数変換処理部を備え、
前記整数変換処理部は、
前記輝度信号の差分信号及び前記色差信号の差分信号のうち、一方の差分信号の整数変換処理として、第1整数変換処理を固定的に適用し、
前記輝度信号の差分信号及び前記色差信号の差分信号のうち、他方の差分信号の整数変換処理として、前記第1整数変換処理及び前記第1整数変換処理とは異なる第2整数変換処理の中から選択された整数変換処理を適用することを特徴とする符号化装置。
Based on a coding target block obtained by dividing a frame image and a predicted image generated for the coding target block, a difference signal of a luminance signal between the coding target block and the predicted image An encoding device that generates a difference signal of the color difference signal and encodes the difference signal of the luminance signal and the difference signal of the color difference signal ,
An integer conversion processing unit that performs integer conversion processing of the difference signal of the luminance signal and performs integer conversion processing of the difference signal of the color difference signal,
The integer conversion processing unit
Of the difference signal of the luminance signal and the difference signal of the color difference signal, the first integer conversion process is fixedly applied as an integer conversion process of one of the difference signals,
Of the difference signal of the luminance signal and the difference signal of the chrominance signal, as the integer conversion process of the other difference signal, the second integer conversion process is different from the first integer conversion process and the first integer conversion process. An encoding apparatus that applies a selected integer conversion process .
前記一方の差分信号は、前記色差信号の差分信号であり、前記他方の差分信号は、前記輝度信号の差分信号であることを特徴とする請求項1に記載の符号化装置。 The encoding apparatus according to claim 1, wherein the one difference signal is a difference signal of the color difference signal, and the other difference signal is a difference signal of the luminance signal . 前記第1整数変換処理は、離散コサイン変換処理であり、前記第2整数変換処理は、離散サイン変換処理であることを特徴とする請求項1又は請求項2に記載の符号化装置。 3. The encoding apparatus according to claim 1, wherein the first integer transform process is a discrete cosine transform process, and the second integer transform process is a discrete sine transform process . 前記整数変換処理部は、前記符号化対象ブロックのブロックサイズに基づいて、前記第1整数変換処理及び前記第2整数変換処理の中から、前記他方の差分信号に適用する整数変換処理を選択することを特徴とする請求項1乃至請求項3のいずれかに記載の符号化装置。The integer conversion processing unit selects an integer conversion process to be applied to the other difference signal from the first integer conversion process and the second integer conversion process based on the block size of the encoding target block. The encoding apparatus according to any one of claims 1 to 3, wherein フレーム画像の符号化を行う符号化装置によって符号化された符号化フレーム画像の復号を行う復号装置であって、A decoding device for decoding an encoded frame image encoded by an encoding device for encoding a frame image,
前記フレーム画像の符号化は、前記フレーム画像を分割することによって得られる符号化対象ブロックと前記符号化対象ブロックに対して生成される予測画像とに基づいて、前記符号化対象ブロックと前記予測画像との間における輝度信号の差分信号及び色差信号の差分信号を生成するとともに、前記輝度信号の差分信号及び前記色差信号の差分信号の符号化を行う手順を含み、  The encoding of the frame image is performed based on the encoding target block obtained by dividing the frame image and the prediction image generated for the encoding target block, and the prediction image. Generating a difference signal of a luminance signal and a difference signal of a chrominance signal, and encoding the difference signal of the luminance signal and the difference signal of the chrominance signal,
前記輝度信号の差分信号の逆整数変換処理を行うとともに、前記色差信号の差分信号の逆整数変換処理を行う逆整数変換処理部を備え、  An inverse integer conversion processing unit that performs an inverse integer conversion process of the difference signal of the luminance signal and an inverse integer conversion process of the difference signal of the color difference signal,
前記逆整数変換処理部は、  The inverse integer conversion processing unit
前記輝度信号の差分信号及び前記色差信号の差分信号のうち、一方の差分信号の逆整数変換処理として、第1逆整数変換処理を固定的に適用し、  Of the difference signal of the luminance signal and the difference signal of the color difference signal, as the inverse integer conversion process of one difference signal, the first inverse integer conversion process is fixedly applied,
前記輝度信号の差分信号及び前記色差信号の差分信号のうち、他方の差分信号の逆整数変換処理として、前記第1逆整数変換処理及び前記第1逆整数変換処理とは異なる第2逆整数変換処理の中から選択された逆整数変換処理を適用することを特徴とする復号装置。  Of the difference signal of the luminance signal and the difference signal of the chrominance signal, a second inverse integer transform different from the first inverse integer transform process and the first inverse integer transform process is performed as the inverse integer transform process of the other difference signal. A decoding apparatus characterized by applying an inverse integer conversion process selected from the processes.
前記一方の差分信号は、前記色差信号の差分信号であり、前記他方の差分信号は、前記輝度信号の差分信号であることを特徴とする請求項5に記載の復号装置。6. The decoding apparatus according to claim 5, wherein the one difference signal is a difference signal of the color difference signal, and the other difference signal is a difference signal of the luminance signal. 前記第1逆整数変換処理は、逆離散コサイン変換処理であり、前記第2逆整数変換処理は、逆離散サイン変換処理であることを特徴とする請求項5又は請求項6に記載の復号装置。The decoding apparatus according to claim 5 or 6, wherein the first inverse integer transform process is an inverse discrete cosine transform process, and the second inverse integer transform process is an inverse discrete sine transform process. . 前記逆整数変換処理部は、前記符号化対象ブロックのブロックサイズに基づいて、前記第1整数変換処理及び前記第2整数変換処理の中から、前記他方の差分信号に適用する整数変換処理を選択することを特徴とする請求項5乃至請求項7のいずれかに記載の復号装置。The inverse integer transform processing unit selects an integer transform process to be applied to the other difference signal from the first integer transform process and the second integer transform process based on the block size of the encoding target block. The decoding device according to claim 5, wherein
JP2010086547A 2010-03-05 2010-04-02 Encoding device, decoding device, and program Active JP5302256B2 (en)

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